Height of the UITextView increases when using IQKeyboardManagers - ios

Question

I recently started to use IQKeyboardManager in my app that I am working on, it works really well except for a little problem. The height of my text view increases when the keyboard appears(Which makes the text view go up), I know this because I am printing the height of the text view each time I click on the text view. Here is the code of my text view:
// Setup text view
func setupTextView() {
// Placeholder text and color
startStoryTextView.textColor = .gray
startStoryTextView.text = "Type here"
startStoryTextView.backgroundColor = .red
// Add some padding to the text insde the text view
startStoryTextView.textContainerInset = UIEdgeInsets(top: 15, left: 10, bottom: 15, right: 10)
startStoryTextView.font = UIFont(name: "PatrickHand-Regular", size: 23)
startStoryTextView.layer.cornerRadius = 25
popUp.addSubview(startStoryTextView)
addTextViewConstraints()
}
// Add the constraints to the text view
func addTextViewConstraints() {
startStoryTextView.translatesAutoresizingMaskIntoConstraints = false
startStoryTextView.leadingAnchor.constraint(equalTo: popUp.leadingAnchor, constant: 3).isActive = true
startStoryTextView.trailingAnchor.constraint(equalTo: popUp.trailingAnchor, constant: -3).isActive = true
startStoryTextView.topAnchor.constraint(equalTo: popUp.topAnchor, constant: 3).isActive = true
//startStoryTextView.heightAnchor.constraint(equalToConstant: 589).isActive = true
startStoryTextView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor, constant: -70).isActive = true
}
// Add constraints to the pop up view
func addPopUpConstraints() {
popUp.translatesAutoresizingMaskIntoConstraints = false
popUp.widthAnchor.constraint(equalToConstant: view.frame.width).isActive = true
popUp.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: 10).isActive = true
popUp.topAnchor.constraint(equalTo: view.topAnchor, constant: 200).isActive = true
popUp.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
view.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
}
Specifying the height of the text view solves this problem but, it will create another problem when the app is used on other devices with different resolutions.
// To print the height of the text view every time the user clicks on the text view
func textViewDidBeginEditing(_ textView: UITextView) {
print(startStoryTextView.frame.height)
}

Answer 1

Don't worry, It is IQKeyboardManager's feature, not an error.
You use IQKeyboardManager, because you want the textView go up, when textViewDidBeginEditing.
The source code is very clear.
When you activate IQKeyboardManager, in IQKeyboardManager.swift, you call override init() {, override init() { do registerAllNotifications ,registerAllNotifications do Registering for UITextField notification.
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillShowDng(_:)), name: UIKeyboardWillShow, object: nil)
// ...
keyboard is already showing. adjust position.
In method func optimizedAdjustPosition()(), the height changes
Your code is weird.
why startStoryTextView.bottomAnchor is related to view.safeAreaLayoutGuide.bottomAnchor.
startStoryTextView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor, constant: -70).isActive = true
Since startStoryTextView.superView is popUp
popUp.addSubview(startStoryTextView)
I think it is code error. IQKeyboardManager unrelated.